fix links

pvlib/clearsky.py

@@ -25,11 +25,11 @@ def ineichen(apparent_zenith, airmass_absolute, linke_turbidity,
     Implements the Ineichen and Perez clear sky model for global
     horizontal irradiance (GHI), direct normal irradiance (DNI), and
     calculates the clear-sky diffuse horizontal (DHI) component as the
-    difference between GHI and DNI*cos(zenith) as presented in [1, 2]. A
+    difference between GHI and DNI*cos(zenith) as presented in [1]_ [2]_. A
     report on clear sky models found the Ineichen/Perez model to have
-    excellent performance with a minimal input data set [3].
+    excellent performance with a minimal input data set [3]_.
 
-    Default values for monthly Linke turbidity provided by SoDa [4, 5].
+    Default values for monthly Linke turbidity provided by SoDa [4]_, [5]_.
 
     Parameters
     -----------
@@ -80,8 +80,8 @@ def ineichen(apparent_zenith, airmass_absolute, linke_turbidity,
        Clear Sky Models: Implementation and Analysis", Sandia National
        Laboratories, SAND2012-2389, 2012.
 
-    .. [4] http://www.soda-is.com/eng/services/climat_free_eng.php#c5 (obtained
-       July 17, 2012).
+    .. [4] https://www.soda-pro.com/help/general-knowledge/linke-turbidity-factor
+       (accessed February 2, 2024).
 
     .. [5] J. Remund, et. al., "Worldwide Linke Turbidity Information", Proc.
        ISES Solar World Congress, June 2003. Goteborg, Sweden.

pvlib/irradiance.py

@@ -602,7 +602,7 @@ def get_ground_diffuse(surface_tilt, ghi, albedo=.25, surface_type=None):
        and
        http://en.wikipedia.org/wiki/Albedo
        and
-       https://doi.org/10.1175/1520-0469(1972)029<0959:AOTSS>2.0.CO;2
+       :doi:`10.1175/1520-0469(1972)029<0959:AOTSS>2.0.CO;2`
     '''
 
     if surface_type is not None:

pvlib/solarposition.py

@@ -132,7 +132,7 @@ def get_solarposition(time, latitude, longitude,
 def spa_c(time, latitude, longitude, pressure=101325, altitude=0,
           temperature=12, delta_t=67.0,
           raw_spa_output=False):
-    """
+    r"""
     Calculate the solar position using the C implementation of the NREL
     SPA code.
 
@@ -161,7 +161,7 @@ def spa_c(time, latitude, longitude, pressure=101325, altitude=0,
         Temperature in C
     delta_t : float, default 67.0
         Difference between terrestrial time and UT1.
-        USNO has previous values and predictions.
+        USNO has previous values and predictions [3]_.
     raw_spa_output : bool, default False
         If true, returns the raw SPA output.
 
@@ -177,17 +177,16 @@ def spa_c(time, latitude, longitude, pressure=101325, altitude=0,
 
     References
     ----------
-    .. [1] NREL SPA reference:
-       http://rredc.nrel.gov/solar/codesandalgorithms/spa/
-       NREL SPA C files: https://midcdmz.nrel.gov/spa/
+    .. [1] NREL SPA reference: https://midcdmz.nrel.gov/spa/
 
     Note: The ``timezone`` field in the SPA C files is replaced with
     ``time_zone`` to avoid a nameclash with the function ``__timezone`` that is
     redefined by Python>=3.5. This issue is
     `Python bug 24643 <https://bugs.python.org/issue24643>`_.
 
-    .. [2] Delta T:
-       https://en.wikipedia.org/wiki/%CE%94T_(timekeeping)
+    .. [2] Delta T: https://en.wikipedia.org/wiki/%CE%94T_(timekeeping)
+
+    .. [3] USNO delta T: https://maia.usno.navy.mil/products/deltaT
 
     See also
     --------
@@ -344,7 +343,7 @@ def spa_python(time, latitude, longitude,
        2007.
 
     .. [3] USNO delta T:
-       http://www.usno.navy.mil/USNO/earth-orientation/eo-products/long-term
+       https://maia.usno.navy.mil/products/deltaT
 
     See also
     --------